| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly reliable control controller including a CPU module and remote IO module, in which a control operation at the time of an abnormality is reliably and selectively performed according to an abnormality factor.SOLUTION: A control controller of the present invention includes: a CPU module that has an abnormal state detection unit for detecting an abnormal operation of a module and performs program control of a plurality of facility apparatuses of a plant; and a plurality of remote IO modules that are daisy-chained to the CPU module by a serial transmission path and convert digital data transmitted from the CPU module to output it to the facility apparatuses. When the abnormal state detection unit detects an abnormal operation, the CPU module notifies the remote IO module of the abnormality of a CPU; and when being notified of the abnormality of the CPU, the remote IO module performs control so as to bring all the facility apparatuses into a stop state separately from control by means of the digital data.SELECTED DRAWING: Figure 1 |
